11,11,11-heptadeca-fluoroundecyl)silyl [C(8)F(17)(CH(2))(n)Si(i-Pr)(2), where n = 2 or 3], of the standard triisopropylsilyl (TIPS) group are compared in the setting of alcohol protection. The fluorous silyl groups can be installed under standard conditions in comparable yields to the TIPS group, but the derived fluorous silyl ethers are more labile than TIPS ethers towards cleavage by both acids and
两种含
氟类似物
二异丙基(3,
3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-十七
氟癸基)甲
硅烷基和
二异丙基的相对稳定性- (4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,11-十七
氟十一烷基)甲
硅烷基[C(8)F(17)(标准
三异丙基甲
硅烷基 (
TIPS) 基团的 CH(2))(n)Si(i-Pr)(2),其中 n = 2 或 3],在
酒精保护设置中进行比较。
氟甲
硅烷基团可以在标准条件下以与
TIPS 基团相当的产率安装,但衍生的
氟甲
硅烷基醚比
TIPS 醚更容易被酸和
氟化物裂解。